Question: For what  Frederic Chopin  was in significant event in the year 1849?
Paraphrase: What important event happened for Frederic Chopin in 1849?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q1268 p:P793 ?s . ?s ps:P793 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'1849')) }